Remote login allows users to access their work computers from any internet-enabled device. It requires the host computer to be running desktop sharing software and connected to both the internet and a secure network. When a remote login request is made, the desktop sharing software establishes a session between the two computers and exchanges data through a secure channel, allowing the user to access the host computer remotely. Common methods for remote login include SSH for Linux/Unix systems and Telnet, which transforms keystrokes into standard characters that travel over the internet to grant remote terminal access to another system.

1. REMOTE LOGIN
By sarju yadav

2. contents
• Introduction
• What are the requisites for remote login ?
• How does remote login work
• Remote login demonstrations
• Telnet

3. Introduction
What is remote login ?
Remote login means to access native computer
from the other computer on the network when
you are connected to internet

4. What does remote login do ?
Remote login allows workers to access their
Work computers from any internet – enabled
Device,including home computers,laptops.

6. requisites for remote login
– Remote login requires three components
– Software download
–Internet connection
– Secure desktop sharing network

7. • Remote login will only work if the host computer
is powered on ,connected to the inernet and
running the desktop sharing software.
• Each time you open and run the desktop sharing
software on the host computer ,the software
starts a new session .
• Each session has a particuler ID and /or password
that’s required to remotely log in to the host
computer .

8. • Once the session has been established,most
desktop sharing software quietly runs in the
background of the host computer until a
remote login request is made.

9. SSH
• It stands for secure shell
• Secure shell is a network protocol that allows
data to be exchanged using a secure channel
between two networked system
• Used primarily on linux and unix based system
to access shell accounts.

10. • SSH uses public-key cryptography to
authenticate the remote computer and allow
the remote computer to authenticate the
user, if necessary .
• For login to a shell on a remote host (replacing
telnet and rlogin ).
• For executing a single command on remote
host .

11. TELNET
• Telnet is a abbreviation for terminal network.
• It is a general purpose client server application
program which is used as a standard TCP/IP
protocol for VTD as proved by ISO.
• It establishes the connection to a remote
system in such a way that the local terminal
appears to be a terminal at the remote system
.

12. How does local login occur?
• When a user logs in to a time-sharing system
it is called local login.
• As the user types at terminal the keystrokes
are accepted by the terminal driver which are
in turn sent to OS.
• The OS interprets the character and invokes
the desired application program accordingly .

13. How does remote login occur in
telnet?
• Here the telnet client and server programs
come into use .
• The keystrokes are sent to terminal driver
where local OS accept it but does not
interpret it .
• The characters are sent to telnet client and
transformed into NVT characters and delivers
them to local TCP/IP protocol stack.

14. • The command or text in NVT form travels
through the internet to TCP/IP stack of remote
machine .
• Here characters are then deliverd to OS and
passed to Telnet server which changes
characters into understandable form.

15. THANK YOU